Ergotron WorkFit-S Dual Monitor Sit and Stand Desk Mount Work Station - Supports two 22in LCDs from 12 to 28lbs total

Ergotron WorkFit-S LCD and Laptop Sit and Stand Desk Mount Work Station - One 20in LCD and One Laptop from 12 to 26lbs total

Ergotron Neo-Flex Dual LCD Height Adjustable Desk Stand with 5in Lift - Pivot and Tilt - Black - up to 22in

Ergotron WorkFit-S LD Sit or Stand Workstation - Holds up to 22in LCD from 6 to 16lbs

Planar Dual Monitor Height Adjustable Stand - Supports 2 Monitors up to 33lbs each - Both 100mm or 75mm VESA standard